Moped Army

The 6v stator on a moped doesn't always put out 6v, that's why the lights are dim at idle and why you can blow bulbs running high rpm. It could be putting out 3v at idle and 13v at 9,000 rpm! Running 12v bulbs in a 6v system may cause them to be dim at idle, or less power for the other lights/accessories. A zener diode can be used as a voltage regulator, either can be used for similar results. If you had enough output you could charge a battery but you would need to wire in a rectifier that converts the ac from the stator to dc to charge the battery. You could probably use one from a bike that has a battery. I believe many scooters have a unit that is both a regulator and a rectifier to charge the battery.